CODEWITHSUNDEEP
c#asp.netfile
user12501057
user12501057

Reputation:

Create file from string and download it

I am having some issues with trying to create a file from a string and download it in ASP.NET Core.

What I am trying to do is that when a user presses a button I fetch some data as a string and create a file from it. In addition I would like to download this file to the pc. I have not been able to figure out a solution that works and so far this is the closest I have gotten:

    public async Task<FileStreamResult> DownloadFile()
    {
        string s = "Some string with data";

        MemoryStream ms = new MemoryStream();
        TextWriter tw = new StreamWriter(ms);

        await tw.WriteAsync(s);

        tw.Flush();

        return File(ms, "application/force-download", "readme.txt");
    }

The problem is that this does not work for some reason, the MemoryStream does not seem to stream the bytes of data to the file.

Upvotes: 1

Views: 1020

Answers (1)

Hadi Samadzad
Hadi Samadzad

Reputation: 1540

Convert memory stream to byte[]:

public async Task<FileStreamResult> DownloadFile()
{
    string s = "Some string with data";

    MemoryStream ms = new MemoryStream();
    TextWriter tw = new StreamWriter(ms);

    await tw.WriteAsync(s);

    tw.Flush();

    byte[] bytes = ms.ToArray();
    ms.Close();

    return File(bytes, "application/force-download", "readme.txt");
}

Upvotes: 1

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